Sounds like you have a bunch of friends who need to grow up.
75%+ I know will consume cannabis, even if its just a casual thing. All are 30+. Almost all are professionals. I don't see why they need to grow up. They have jobs, they provide, the follow the law. Its not like they are sitting on their couch getting their kid stoned and playing xbox.
it's just like drinking around your kids IMO. if they see you, just remind them it's for older people
that would be my take, but wanted to see what the OT thinks.